Electrical Engineering JE/AE Classes & Mech,Civil

now new batches start for je and sr. section engg. railways and chargeman for ordinance factory

which power amplifier has cross over distortion
a- class a ampl
b- class c ampl
c-calss b ampl
d-class ab ampl

transistor works as a switch ........
a-only in active region
b-only in saturation region
c-only in cutoff region
d- in both saturation and cutoff region

iron losses per cycle curve of a transformer is
1- parabola
3-hyperbola
3 - straight line with positive slope
4- none of these

gravity control mechanism is used where

the resistance of emmiter in bjt
a-always less than base and collector resistance
b-always greater than base and collector resistance
c- all are equal
d-none of these

when we increase temperature then conductivity of metal-
a- increase
b-decrese
c-same
d-none of these

why transformer core is made of a cold rolled sheet

which is most suitable connection of 3 phase transformer.
a- star star
b- star-delta
c-delta-delta
d- delta-star

which diode acts as a resistor in reverse bias

Now Started New batches For Ordinance Factory for Mechanical ,Electrical ,&Civil